Extended Array Evaluation Program. Special Report No. 2. Simulated On- Line Adaptive Processing Results Using Alaska Long Period Array Data

Abstract

The report deals with results obtained from operating an adaptive time-domain maximum-likelihood filtering system on data from the Alaska Long- Period Array (ALPA). Signal-to-noise gain of adaptive filtering relative to beamsteering is investigated as a function of convergence rate and steer direction. In addition, the effect upon signal-to-noise gain of freezing the adaptive filter set is described. Both on-azimuth and off-azimuth signals are examined to determine how much they are attenuated in the adaptive filter beam in comparison with the beamsteer output. Signal-to-noise gain values presented are measured using beam output traces formed from actual seismic data. Theoretical studies of the effect of floating DC levels and roundoff error are also contained in this report.

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Document Details

Document Type
Technical Report
Publication Date
Oct 23, 1973
Accession Number
AD0785199

Entities

People

  • Thomas E. Barnard

Organizations

  • Texas Instruments

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Background Noise
  • Beam Steering
  • Computer Programs
  • Data Science
  • Diagrams
  • Distribution Functions
  • Filtration
  • Frequency Bands
  • Frequency Response
  • Information Science
  • Probability Distributions
  • Random Variables
  • Rayleigh Waves
  • Signal Processing
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Approximation Theory.
  • Radio communications and signal processing.
  • Seismology